The Files Download Delay plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'fddwrap' shortcode in all versions up to, and including, 1.0.9 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Files Download Delay WordPress plugin before 1.0.7 does not have authorisation and CSRF checks when reseting its settings, which could allow any authenticated users, such as subscriber to perform such action.